One of the main requirements to carbon materials is their purity. The authors have proposed and experimentally tested a new method for vacuum-thermal refining of carbon materials using NaCl vapor as an activator. It is experimentally confirmed that this method allows increasing the refining process efficiency and decreasing the energy consumption. The proposed method can be an alternative to modern methods of chlorine- and fluorine thermal refining that permits to exclude the use of hazardous reagents.
The sorption capacity for iodine vapors of samples of carbon fiber cloth materials 31-3, 31-6, 35-1, 35-2, and KIPT 16-00 obtained at NSC KIPT, carbon fiber cloth materials of the Saut and Busofit brands and active granular carbons ISQ-3, SKT-3, and DGF-2 has been studied. The sorption capacity of carbon fiber cloth materials of series 31-6 and KIPT 16-00 is ~ 30% higher in comparison with Saut fiber cloth and ~ 4 times higher than the characteristics of active granular carbons SKT-3 and DGF-2 it has been shown.
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